Endless Bike Kick Ass Cog Anodized Pictures do not necessarily display the correct size, please select desired size Shape, width and height of the teeth are CAD designed and optimized for Singlespeed use with 3/32" chains (1/8" OK) Machined 7075-T6 aluminum singlespeed cogs Wide base prevents the cog from digging into freehub bodies and reduces flex Splines are machined for perfect alignment and fit on all mountain cassette hubs